Winding machine

ABSTRACT

A winding machine for the winding-up of strip band material about a roll, including a grooved shaft disposed perpendicularly with respect to the roll winding axle, and a drive transmitting gear member shiftable along the groove in accordance with the winding axis shift during change in roll diameter, the course of said groove being governed by the angle of the frictional force between the grooved shaft and the gear member occurring during the winding-up of the roll.

United States Patent 1191 1111 3,759,458 Thomas Sept. 18, 1973 WINDINGMACHINE 3,297,273 1/1967 Inventor: Hermann Thomas, Darmstadt,

Germany Assignee: Masehinenfabrik GOEBEL G.m.b.1-1., Darmstadt, GermanyFiled: Mar. 31, 1972 Appl. No.: 240,049

US. Cl. 242/67.1 R, 242/18 R Int. Cl B65h 17/02 Field of Search242/75.5, 67.5, 66,

References Cited UNITED STATES PATENTS 11 /1954 Cherigie 242/75.5 x

lppolito 242/75.5

Primary Examiner-George F. Mautz Assistant Examiner-Edward J. McCarthyAttorney-Watson, Cole, Grindle & Watson [57] ABSTRACT A winding machinefor the winding-up of strip band material about a roll, including agrooved shaft disposed perpendicularly with respect to the roll windingaxle, and a drive transmitting gear member shiftable along the groove inaccordance with the winding axis shift during change in roll diameter,the course of said groove being governed by the angle of the frictionalforce between the grooved shaft and the gear member occurring during thewinding up of the roll.

1 Claim, 1 Drawing Figure 1 WINDING MACHINE The invention relates to awinding machine for winding strip material bands. Such machines are veryoften arranged in such a way that the roll to be wound fits against oneor several supporting rollers rotatably mounted on the frame of themachine. Whenever the winding shaft is rotatably driven, the driveelement of the winding shaft must, of course, change its position inrelation to the change of thediameter of the roll to be wound.

l-leretofore, the torque acting through the winding shaft of the roll ofsuch prior art machines was transmitted from the drive of the machine tothe winding shaft by means of a shaft disposed perpendicular to the axleand located on a front side of the roll to be wound and through a bevelgear engaging in one or more grooves extending parallel to the axis ofthe shaft. With such an arrangement, the torque, transmitted through theperpendicularly disposed shaft, changes during the winding processwhenever the strip material is wound up at a uniform tension.

During a shifting of the driving gear disposed about the perpendicularlydisposed shaft, frictional forces occurring at said shaft, and whichdepend on the torque transmitted in each instance, can reach valueswhich make the shifting movement of the winding shaft during the changeof roll diameter much more difficult and which as a result have adisadvantageous effect on the quality of the winding, especially with anincreasing value of the torque transmitted by the shaft. For example,the hardness of the roll across the diameter of the roll may be variableor may be different from one front side to the other. i

It is the object of this invention to avoid the aforementioneddisadvantages and to provide a simple yet very effective improvement,characterized in that the angle formed by the course of the groove orgrooves provided on the perpendicularly disposed shaft periphery and thegeneratrix of the periphery of the shaft being governed by thefrictional angle between the perpendicular shaft and the driving gearwheel. With such an arrangement of the groove or grooves, the frictionalforce developing during the shifting of the driving gear wheel will beat least approximately compensated by an opposed component of theperipheral force within the groove, corresponding to thetorquetransmitted by the shaft, so that it will not affect the shiftingmovementof the winding shaft.

The invention will be described in detail with reference to theaccompanying drawing which schematicallyillustrates the invention.

In the drawing, a supporting roller 2 is shown rotatably mounted onframe 1 of the winding machine. Ad-

ditional rollers 2 may, of course, be mounted in a similar manner sothat a roll 3 to be wound may be supported by such rollers. Windingshaft 4 of roll 3 is mounted on frame 1 within a cradle 5 which iscapable of being shifted in corresponding guides along a pathperpendicular to shaft 4. A bevel gear 6 is fixedly secured to thefreeend of shaft 4 for rotation therewith. Cradle 5 carries an arm 7 onwhich another bevel gear 8 is rotatably mounted in a manner whereby itcannot move away from arm 7. A shaft 10 provided with a groove 9 extendsthrough gear 8 and is rotated by I wound, at least one support rollerfor supporting said' means of a drive shaft 11 and bevel gears drive l2,13 from a power source (not shown). Bevel gear 8, along with arm 7, iscapable of being axially shifted along shaft 10 by means of a featherkey 14 which fits within groove 9, and a complementary groove (notshown) in gear 8. Upon rotation of shaft 10, bevel gear 8 rotates bevelgear 6 which in turn rotates winding shaft 4 and roll 3. By reason ofgroove 9, gear 8 can shift along shaft 10 in accordance with thechanging diameter of roll 3 as it is being wound.

Because the angle formed by the course of the groove 9 and thegeneratrix of the periphery of the shaft depends on the angle offriction between shaft 10 and bevel gear 8, the peripheral forcecorresponding to the transmitted torque between shafts 10 and 4 affectsthe feather key 14 in such a way that one of its components opposes thefrictional force acting between the shaft 10 and the feather key 14connected with the bevel gear 8. Both forces are of approximately thesame value, and their ration is not dependent on the torque transmittedby shaft 10. I Accordingly, with such a development of groove 9, theshifting of gear 8 travelling with winding shaft 4 is made easierwithout adversely affecting the quality of the winding of the tape onroll 3.

Naturally, it is within the scope of the invention to wind several rolls3 (not shown), disposed on the same windingshaft 4, instead of only one.The aforementioned difficulties will also occur with the use of severalrolls 3 as discussed with reference: to the prior art machines. Thewinding shaft4 for the rolls 3 is driven just as effectively, however,as one roll.

Obviously, many modification and variation of the present invention arepossible in the light of the above teachings. For example, roll 3 may berotated by additional rollers 2 disposed either above roll 3 or to-itsside during the winding of only so that, during an incrase in diameterof wound roll 3,

the winding shaft is moved downwardly or transversely during the windingprocess. With such an arrangement, it is essential merely that thetorque acting through the windingshaft of either transmitted roll betransmitted by means of a shaft disposed perpendicularly in relation tothe axle of roll 3. 7 I

It is therefore to be understood that within the scope of the appendedclaims, the invention may be practiced otherwise than as specificallydescribed.

What is claimed is: r I I 1. A winding machine for the winding-up ofstrip material, comprising a roll ontowhich the material is tobe roll atits periphery, a rotatable shaft disposed perpendicularly with respectto the axle of said roll, gear meansoperatively inteconnecting saidshaft and said roll to thereby transmit the rotation of said rotatableshaft to said roll, said gear means including a rotatable gear membermounted for axial movement along said shaft and guided by means ofgroove provided on the periphery of said shaft helical to thelongitudinal axis I thereof, the course of said groove being governed bythe angle of the frictional force between said rotatable shaft and saidgear member occurring during the winding-up of said roll. v

1. A winding machine for the winding-up of strip material, comprising aroll onto which the material is to be wound, at least one support rollerfor supporting said roll at its periphery, a rotatable shaft disposedperpendicularly with respect to the axle of said roll, gear meansoperatively inteconnecting said shaft and said roll to thereby transmitthe rotation of said rotatable shaft to said roll, said gear meansincluding a rotatable gear member mounted for axial movement along saidshaft and guided by means of groove provided on the periphery of saidshaft helical to the longitudinal axis thereof, the course of saidgroove being governed by the angle of the frictional force between saidrotatable shaft and said gear member occurring during the winding-up ofsaid roll.